What are the chances?

So I’ve had sex (protected = used condoms) 3 times this cycle. The last time I had sec the condom wasn’t taken off properly so I did take plan b just to be sure. My period is due in about 4 days.

I haven’t had any of the ‘traditional’ symptoms of pregnancy - no sore breasts, no spotting or cramping, food aversions or cravings (carbs n chocolate I guess but that’s normal for me 🤣) however I’ve been having a bit of heartburn which isn’t that normal for me. I am noticing symptoms of PMS - emotional, acne, sensitive & clingy.

However, I think period symptoms are similar to pregnancy symptoms? Just wondering if anyone could give me any reassurance or advice as to the chances of pregnancy as I’m not TTC and am fairly paranoid about it.

Thanks for reading 😋